Image:Area_code_MT.png, Map of Montana area code in blue (with border states and provinces) poly 67 33 0 20 1 1 51 0 58 24 Area code 250 poly 66 33 57 25 52 0 198 0 198 54

Area code 403 Area code 403 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of Alberta. The numbering plan area encompasses the southern third of the province, which includes the Calgary area. This numbering plan ...

poly 198 55 198 0 419 0 418 72 265 63

Area code 306 Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while ''surface area'' refers to the area of an open su ...

poly 373 71 419 71 419 212 364 210 Area code 701 poly 364 212 363 267 419 267 419 212 Area code 605 poly 140 233 133 268 363 269 362 255 Area code 307 poly 1 21 15 23 6 70 12 85 12 99 37 137 47 141 36 165 39 178 31 179 32 187 35 195 51 188 58 216 65 222 60 221 61 230 71 230 71 248 77 254 79 247 92 253 93 246 110 250 121 250 125 243 130 256 135 259 134 268 1 267

Area codes 208 and 986 Area codes 208 and 986 are the area codes in the North American Numbering Plan for all of Idaho. Area code 208 is one of the 86 original area codes created by AT&T in 1947. It was Idaho's sole area code until 2017, when 986 was added as an overla ...

desc top-right Area code 406 is the

telephone A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into e ...

area code covering the entire state of

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columb ...

. It has been Montana's only area code since area codes were created in 1947. As of 2013, there were 1.7 million lines served by 47 carriers; all but two wireline providers support local number portability (the exceptions are small rural independents Hot Springs Telephone Company and Northern Telephone Cooperative). Sufficient available codes for new exchanges in the 406 area code exist to meet anticipated demand until 2027; number pooling has been implemented in response to increased demand and inefficient use of 406 numbering resources. Prior to October 2021, area code 406 had telephone numbers assigned for the central office code 988. In 2020, ''988'' was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.

Exchanges in area code 406

* Absarokee: 328, 985 * Alberton: 722 * Alta: 349 * Alzada: 828, 938 *

Anaconda Anacondas or water boas are a group of large snakes of the genus '' Eunectes''. They are found in tropical South America. Four species are currently recognized. Description Although the name applies to a group of snakes, it is often used t ...

: 559, 560, 563, 691, 797 *

Arlee Arlee ( Salish: nɫq̓alqʷ, nɫq̓a ) is an unincorporated community and census-designated place (CDP) in Lake County, Montana, United States. The population was 636 at the 2010 census. It is named after Alee, a Salish chief. The chief's nam ...

: 726 * Ashland: 784, 983 * Augusta: 562 * Avon: 492 * Bainville: 769 * Baker: 778, 891, 956, 978 * Belfry: 664 *

Belgrade Belgrade ( , ;, ; names in other languages) is the capital and largest city in Serbia. It is located at the confluence of the Sava and Danube rivers and the crossroads of the Pannonian Plain and the Balkan Peninsula. Nearly 1,166,763 mi ...

: 388, 813, 924 *

Belt Belt may refer to: Apparel * Belt (clothing), a leather or fabric band worn around the waist * Championship belt, a type of trophy used primarily in combat sports * Colored belts, such as a black belt or red belt, worn by martial arts practiti ...

: 277 * Bigfork: 420, 837 * Big Sandy: 378 * Big Sky: 993, 995, 999 * Big Timber: 930, 931, 932, 936 *

Billings Billings is the largest city in the U.S. state of Montana, with a population of 117,116 as of the 2020 census. Located in the south-central portion of the state, it is the seat of Yellowstone County and the principal city of the Billings Metro ...

: 200, 206, 208, 237, 238, 245, 247, 248, 252, 254, 255, 256, 259, 272, 281, 294, 318, 325, 371, 373, 384, 435, 534, 545, 591, 598, 601, 606, 620, 647, 651, 652, 655, 656, 657, 661, 670, 671, 672, 690, 694, 696, 697, 698, 702, 794, 839, 850, 855, 860, 861, 867, 869, 876, 894, 896, 927, 969 * Birney: 984 * Bloomfield: 583 *

Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In ...

: 225, 313 * Box Elder: 352 *

Bozeman Bozeman is a city and the county seat of Gallatin County, Montana, United States. Located in southwest Montana, the 2020 census put Bozeman's population at 53,293, making it the fourth-largest city in Montana. It is the principal city of ...

: 209, 219, 312, 404, 414, 451, 522, 539, 548, 551, 556, 570, 577, 579, 580, 581, 582, 585, 586, 587, 589, 595, 599, 600, 602, 624, 898, 916, 920, 922, 994 * Brady: 753 * Bridger: 662, 800 * Broadus: 436, 935 * Broadview: 667 * Brockton: 786 *

Browning Browning may refer to: Arts and entertainment * The Browning, an American electronicore band * ''Browning'', a set of variations by the composer William Byrd Places * Browning, Georgia, USA * Browning, Illinois, USA * Browning, Missouri, ...

: 338, 573 * Busby: 592 *

Butte __NOTOC__ In geomorphology, a butte () is an isolated hill with steep, often vertical sides and a small, relatively flat top; buttes are smaller landforms than mesas, plateaus, and tablelands. The word ''butte'' comes from a French word me ...

: 221, 299, 310, 479, 490, 491, 494, 496, 497, 498, 533, 565, 593, 723, 782, 792 * Canyon Creek: 368 * Carlyle: 588 * Carter: 734 *

Cascade Cascade, Cascades or Cascading may refer to: Science and technology Science *Cascade waterfalls, or series of waterfalls * Cascade, the CRISPR-associated complex for antiviral defense (a protein complex) * Cascade (grape), a type of fruit * Bioc ...

: 468 * Charlo: 644 *

Chester Chester is a cathedral city and the county town of Cheshire, England. It is located on the River Dee, close to the English–Welsh border. With a population of 79,645 in 2011,"2011 Census results: People and Population Profile: Chester Loca ...

: 759 * Chinook: 357 *

Choteau Choteau is a city in and the county seat of Teton County, Montana, United States. It lies along U.S. Routes 89 and 287, (the latter terminating at the former in this city) approximately east of the Rocky Mountains, near Flathead National ...

: 466 *

Circle A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is cons ...

: 485, 974 * Clinton: 330, 825 * Clyde Park: 686 *

Colstrip Colstrip is a city in Rosebud County, Montana, United States. The population was 2,096 at the 2020 census. Established in 1924 and incorporated as a city in 1998, Colstrip is the largest city in Rosebud County with 25.2% of the total populatio ...

: 213, 720, 740, 748, 749 * Columbia Falls: 892, 897 *

Columbus Columbus is a Latinized version of the Italian surname "''Colombo''". It most commonly refers to: * Christopher Columbus (1451-1506), the Italian explorer * Columbus, Ohio, capital of the U.S. state of Ohio Columbus may also refer to: Places ...

: 290, 298, 321, 322, 780 * Condon: 754 * Conrad: 271, 278, 289, 505, 576 *

Cooke City Cooke City is an unincorporated community and census-designated place (CDP) in Park County, Montana, United States. As of the 2010 census, it had a population of 75. Prior to 2010, it was part of the Cooke City-Silver Gate CDP. The community ...

: 838 * Crooked Creek: 484 * Culbertson: 514, 787, 790 * Custer: 856 * Cut Bank: 229, 391, 845, 873 * Dagmar: 483 * Darby: 821 * Decker: 757 *

Deer Lodge Deer Lodge is a city in and the county seat of Powell County, Montana, Powell County, Montana, United States. The population was 2,938 at the 2020 United States Census, 2020 census. Description The city is perhaps best known as the home of t ...

: 415, 645, 846 * Denton: 567 *

Devon Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devo ...

: 432 *

Dillon Dillon may refer to: People *Dillon (surname) * Dillon (given name) * Dillon (singer) (born 1988), Brazilian singer * Viscount Dillon, a title in the Peerage of Ireland Places Canada *Dillon, Saskatchewan United States *Dillon Beach, Californ ...

: 596, 660, 683, 865, 925, 960, 988 * Divide: 267, 553 *

Dixon Dixon may refer to: Places International * Dixon Entrance, part of the Inside Passage between Alaska and British Columbia Canada * Dixon, Ontario United States * Dixon, California * Dixon, Illinois * Dixon, Greene County, Indiana * Dixon, In ...

: 246 * Dodson: 383 * Drummond: 288 * Dupuyer: 472 * Dutton: 476 * East Conrad: 627 * East Glacier Park: 226 *

Ekalaka Ekalaka is a town in and the county seat of Carter County, Montana, United States. The population was 399 at the 2020 census. History Ekalaka was named after a Sioux girl, Ijkalaka, who was the wife of David Harrison Russell, a scout. Ijka ...

: 775, 975 * Elmo: 631, 849 * Ennis: 682 * Ethridge: 339 * Eureka: 296 * Eureka rural: 297, 882, 889 * Fairfield: 467 * Fairview: 742, 747 * Fallon: 486 * Finley Point: 571, 887 * Flaxville: 474 * Flaxville rural: 779 * Forsyth: 201, 346, 351, 356, 729 * Fort Benton: 621, 622 * Fort Peck: 526 * Fort Shaw: 264 * Fort Smith: 666 * Frazer: 695 * Frenchtown: 508, 626 * Froid: 766 * Froid rural: 963 * Fromberg: 668 * Gallatin Gateway: 518, 763 * Gardiner: 848 * Geraldine: 737 *

Geyser A geyser (, ) is a spring characterized by an intermittent discharge of water ejected turbulently and accompanied by steam. As a fairly rare phenomenon, the formation of geysers is due to particular hydrogeological conditions that exist only i ...

: 735 * Gildford: 376 *

Glasgow Glasgow ( ; sco, Glesca or ; gd, Glaschu ) is the most populous city in Scotland and the fourth-most populous city in the United Kingdom, as well as being the 27th largest city by population in Europe. In 2020, it had an estimated popu ...

: 228, 230, 263, 831, 942 *

Glendive Glendive is a city in and the county seat of Dawson County, Montana, United States, and home to Dawson Community College. Glendive was established by the Northern Pacific Railway when they built the transcontinental railroad across the northern ...

: 345, 359, 365, 377, 948, 987 * Glentana: 724 * Grant: 681 * Grass Range: 428, 928 * Great Falls: 205, 216, 217, 231, 268, 315, 403, 452, 453, 454, 455, 564, 590, 604, 727, 731, 750, 760, 761, 770, 771, 781, 788, 791, 799, 836, 866, 868, 870, 878, 899, 923, 952, 964, 965 *

Hamilton Hamilton may refer to: People * Hamilton (name), a common British surname and occasional given name, usually of Scottish origin, including a list of persons with the surname ** The Duke of Hamilton, the premier peer of Scotland ** Lord Hamilto ...

: 360, 361, 363, 369, 375, 381, 802, 961 * Hardin: 623, 629, 638, 665, 679, 699, 953 *

Harlem Harlem is a neighborhood in Upper Manhattan, New York City. It is bounded roughly by the Hudson River on the west; the Harlem River and 155th Street on the north; Fifth Avenue on the east; and Central Park North on the south. The greater Ha ...

: 353 * Harlowton: 632 * Harrison: 685 * Haugan: 678 * Havre: 262, 265, 808, 879, 945 * Hays: 673 *

Helena Helena may refer to: People *Helena (given name), a given name (including a list of people and characters with the name) *Katri Helena (born 1945), Finnish singer *Helena, mother of Constantine I Places Greece * Helena (island) Guyana * H ...

: 202, 204, 227, 324, 389, 410, 417, 422, 430, 431, 437, 438, 439, 440, 441, 442, 443, 444, 447, 449, 457, 458, 459, 461, 465, 475, 495, 502, 513, 555, 558, 594, 603, 634, 841, 933, 992, 996 * Highwood: 733 * Hingham: 397 * Hinsdale: 364 * Hobson: 423 * Hopp Illiad: 386 *

Hot Springs A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circ ...

: 741 * Hungry Horse: 387, 929 * Huntley: 348 * Hysham: 342 * Jackson: 834 * Joliet: 905, 962 * Joplin: 292 *

Jordan Jordan ( ar, الأردن; tr. ' ), officially the Hashemite Kingdom of Jordan,; tr. ' is a country in Western Asia. It is situated at the crossroads of Asia, Africa, and Europe, within the Levant region, on the East Bank of the Jordan Rive ...

: 557, 977 * Judith Gap: 473 *

Kalispell Kalispell (, Montana Salish: Ql̓ispé, Kutenai language: kqayaqawakⱡuʔnam) is a city in, and the county seat of, Flathead County, Montana, United States. The 2020 census put Kalispell's population at 24,558. In Montana's northwest region ...

: 212, 249, 250, 253, 257, 260, 261, 270, 300, 309, 314, 407, 471, 607, 751, 752, 755, 756, 758, 858, 871, 885, 890 * Kevin-Oilmont: 337 * Kremlin: 372 * Lakeside: 709, 844 * Lambert: 774, 914 * Lame Deer: 477 * Larslan: 725 * Laurel: 530, 628, 633, 743, 812 * Lavina: 636 * Lewistown: 350, 366, 380, 535, 538, 707, 708, 968 *

Libby Libby as a feminine given name is typically a diminutive form of Elizabeth, which is less commonly spelled 'Libbie' or ' Libi'. In recent years, it has been used as a shortened version of the name Liberty. As a surname, it can also be spelled ' ...

: 283, 291, 293, 334, 400 *

Lima Lima ( ; ), originally founded as Ciudad de Los Reyes (City of The Kings) is the capital and the largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín Rivers, in the desert zone of the central coastal part of ...

: 276, 340 * Lincoln: 362 * Lindsay: 584 *

Livingston Livingston may refer to: Businesses * Livingston Energy Flight, an Italian airline (2003–2010) * Livingston Compagnia Aerea, an Italian airline (2011–2014), also known as Livingston Airline * Livingston International, a North American customs ...

: 220, 222, 223, 224, 333, 823, 946 * Lodge Grass: 639 *

Loma Loma may refer to: Geography United States * Loma, Colorado * Loma, Montana * Loma, Nebraska * Loma, North Dakota Other countries * Loma, Ladakh, a town in Ladakh, India * Loma (woreda), a district in Southern Nations, Nationalities, and Peo ...

: 739 *

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

: 301, 654, 680 *

Manhattan Manhattan (), known regionally as the City, is the most densely populated and geographically smallest of the five boroughs of New York City. The borough is also coextensive with New York County, one of the original counties of the U.S. state ...

: 282, 284 * Marion: 854, 991 * Martinsdale: 572 * Medicine Lake: 789 *

Melrose Melrose may refer to: Places United Kingdom * Melrose, Scottish Borders, a town in the Scottish Borders, Scotland ** Melrose Abbey, ruined monastery ** Melrose RFC, rugby club Australia * Melrose, Queensland, a locality in the South Burnett R ...

: 835 * Melstone: 358 * Melville: 537 * Miles City: 232, 233, 234, 851, 852, 853, 874, 934, 944, 951 * Missoula: 203, 207, 214, 215, 218, 239, 240, 241, 243, 251, 258, 273, 274, 303, 317, 327, 329, 370, 396, 493, 523, 529, 531, 532, 540, 541, 542, 543, 544, 546, 549, 550, 552, 721, 728, 829, 830, 880, 926 * Molt: 669 *

Moore Moore may refer to: People * Moore (surname) ** List of people with surname Moore * Moore Crosthwaite (1907–1989), a British diplomat and ambassador * Moore Disney (1765–1846), a senior officer in the British Army * Moore Powell (died c. 1 ...

: 374 * Musselshell: 947 * Nashua: 746 * Neihart: 236 * North Broadus: 554 * North Cut Bank: 336 * North Frannie: 764 * North Glasgow: 367 * North Hinsdale: 648 * North Nashua: 785 * North Parkman: 643, 659 * North Poplar: 448 * North Havre: 394, 398 * North Ryegate: 575 * North Wolf Point: 392 * Noxon: 847 * Olney: 820, 881 * Opheim: 762 * Outlook: 895 *

Ovando Ovando is a surname. Notable people with the surname include: *Alfredo Ovando Candía (1918–1982), Bolivian general, president and dictator * Clementina Díaz y de Ovando (1916–2012), Mexican writer and researcher *Diego de Cáceres y Ovando, S ...

: 793 * Pablo: 275, 332, 675 *

Peerless Peerless may refer to: Companies and organizations * Peerless Motor Company, an American automobile manufacturer. * Peerless Brewing Company, in Birkenhead, UK * Peerless Group, an insurance and financial services company in India * Peerless Re ...

: 893 * Pendroy: 469 * Philipsburg: 859 * Plains: 826 * Plentywood: 765 * Plevna: 772, 971 * Polson: 319, 872, 883, 884 * Pompey's Pillar: 875 * Poplar: 768 * Potomac: 244 * Power: 463 * Rapelje: 663 * Raynesford: 738 * Red Lodge: 425, 426, 445, 446, 818 * Reed Point: 326 *

Reserve Reserve or reserves may refer to: Places * Reserve, Kansas, a US city * Reserve, Louisiana, a census-designated place in St. John the Baptist Parish * Reserve, Montana, a census-designated place in Sheridan County * Reserve, New Mexico, a US ...

: 286 * Richey: 773, 979 *

Ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...

: 767 * Rock Springs: 354 * Ronan: 528, 676, 833 * Rosebud: 347 * Roundup: 320, 323, 331, 913 * Roy: 464, 954 * Rudyard: 355 * Ryegate: 568 * Saco: 527 * Saint Ignatius: 744, 745, 824 * Saint Mary: 732 * Savage: 776 * Scobey: 487, 688 * Scobey rural: 783 * Seeley Lake: 210, 499, 677 * Shelby: 424, 434, 450, 460, 470, 597, 966 *

Sheridan Sheridan may refer to: People Surname *Sheridan (surname) *Philip Sheridan (1831–1888), U.S. Army general after whom the Sheridan tank is named *Richard Brinsley Sheridan (1751–1816), Irish playwright (''The Rivals''), poet and politician ...

: 842 * Sidney: 433, 478, 480, 482, 488, 489, 630, 943, 973 * Silvertip: 574, 840 * Somers: 393, 857 * South Alberton: 864 * South Broadus: 427 * South Chester: 456 * South Miles City: 421, 981 * South Havre: 390, 395, 399 * South Malta: 658 * South Wolf Point: 525, 915 * Stanford: 566 * Stevensville: 625, 777 * Stockett: 736 * Saint Regis: 269, 280, 649 *

Sunburst A sunburst is a design or figure commonly used in architectural ornaments and design patterns and possibly pattern books. It consists of rays or "beams" radiating out from a central disk in the manner of sunbeams. Sometimes part of a sunburs ...

: 561, 937 *

Superior Superior may refer to: *Superior (hierarchy), something which is higher in a hierarchical structure of any kind Places *Superior (proposed U.S. state), an unsuccessful proposal for the Upper Peninsula of Michigan to form a separate state *Lake ...

: 382, 515, 822 *

Swan Lake ''Swan Lake'' ( rus, Лебеди́ное о́зеро, r=Lebedínoye ózero, p=lʲɪbʲɪˈdʲinəjə ˈozʲɪrə, link=no ), Op. 20, is a ballet composed by Russian composer Pyotr Ilyich Tchaikovsky in 1875–76. Despite its initial failur ...

: 612, 886 * Sweetgrass: 335 * Terry: 635, 637, 957 * Thompson Falls: 242, 615, 827 * Three Forks: 285, 616 * Townsend: 266, 521, 949, 980 *

Troy Troy ( el, Τροία and Latin: Troia, Hittite: 𒋫𒊒𒄿𒊭 ''Truwiša'') or Ilion ( el, Ίλιον and Latin: Ilium, Hittite: 𒃾𒇻𒊭 ''Wiluša'') was an ancient city located at Hisarlik in present-day Turkey, south-west of Ç ...

: 295 * Turner: 379 * Twin Bridges: 684 * Valier: 279 * Victor: 642 * Virginia City: 843 * Valley Industrial Park: 524 * Warm Springs: 693 *

West Beach West Beach may refer to: ;Australia *West Beach, South Australia * West Beach, Western Australia ;United States * West Beach (Santa Barbara), California * West Beach, Beverly, Massachusetts ;South Africa * West Beach, Western Cape See also *''Wes ...

: 877 * Westby: 385 * West Camp Crook: 972 * West Glacier: 888 * West Glendive: 687, 939, 941, 989 * West Sidney: 798 * West Squaw Gap: 569 *

West Yellowstone West Yellowstone is a town in Gallatin County, Montana, United States, adjacent to Yellowstone National Park. The population was 1,272 at the 2020 census. West Yellowstone is served by Yellowstone Airport. It is part of the Bozeman, MT Micropo ...

: 640, 641, 646 * Whitefish: 730, 862, 863 *

Whitehall Whitehall is a road and area in the City of Westminster, Central London. The road forms the first part of the A3212 road from Trafalgar Square to Chelsea. It is the main thoroughfare running south from Trafalgar Square towards Parliament Sq ...

: 287 *

Whitewater Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and ...

: 674 * White Sulphur Springs: 305, 547 * Wibaux: 795, 796 * Wilsall: 578 *

Winifred Winifred is a feminine given name, an anglicization of Welsh ''Gwenffrewi'', from ''gwen'', "fair", and ''ffrew'', "stillness". It may refer to: People * Saint Winifred * Winifred Atwell (1914–1983), a pianist who enjoyed great popularity in Br ...

: 462 * Winnett: 429 *

Wisdom Wisdom, sapience, or sagacity is the ability to contemplate and act using knowledge, experience, understanding, common sense and insight. Wisdom is associated with attributes such as unbiased judgment, compassion, experiential self-knowledg ...

: 689 * Wise River: 832 *

Wolf Creek Wolf Creek may refer to: Bodies of water Missouri * Wolf Creek (Beaver Creek tributary) * Wolf Creek (Cane Creek tributary) * Wolf Creek (Cave Creek tributary) * Wolf Creek (Elkhorn Creek tributary) * Wolf Creek (South Grand River tributary) * ...

: 235, 302 *

Wolf Point Wolf Point ( asb, šųktógeja oʾípa) is an incorporated ranchingtown in, and the county seat of, Roosevelt County, Montana, United States. The population was 2,517 at the 2020 census, down 4% from 2,621 in the 2010 Census. It is the larges ...

: 650, 653 * Worden: 967 * Wyola: 343 * Yellow Bay: 692, 982 * Premium numbers: (1-406) 976

Use by Google

On December 10, 2008,

Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...

's Gmail Blog announced that

SMS Short Message/Messaging Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile devices exchange short text ...

messages could be sent from inside Gmail. The messages are sent from numbers in the 406 area code. Each number is unique and can be bookmarked for replies or future use. Google also employs the use of area code 406 for the assignment of reply-to or callback numbers for

Google Voice Google Voice is a telephone service that provides a U.S. phone number to Google Account customers in the U.S. and Google Workspace (G Suite by October 2020) customers in Canada, Denmark, France, the Netherlands, Portugal, Spain, Sweden, Switz ...

's customers' contacts.

Exchanges in area code 406

Use by Google

References

See also